chore: Update welcome page

[kyle-ssg]

Thanks for submitting a PR! Please check the boxes below:

• I have added information to docs/ if required so people know about the feature!
• I have filled in the "Changes" section below?
• I have filled in the "How did you test this code" section below?
• I have used a Conventional Commit title for this Pull Request

Changes

• Adds latest ebook to the resources page
• Adds scrollable overflow to resources
• Uses web urls for images
• Fixes issue where objectPosition:center caused images to be unreadable in chrome

How did you test this code?

As above

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
flagsmith-frontend-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 10, 2025 10:58am
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 10, 2025 10:58am

1 Skipped Deployment

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docs	⬜️ Ignored (Inspect)			Jun 10, 2025 10:58am

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-5555	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-5555	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-5555	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-5555	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-5555	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-5555	Finished ✅	Results ✅

[Zaimwa9]

Thanks. Could be interesting to run an A/B test on the 2 ebooks wdyt?